And that's why you were logged out.
It had nothing to do with not having internet.
You don't need internet to fly ... just to log in after you haven't flown for several months.
It should be noted that DJI agreed to cooperate with a formal U.S. Government audit of its systems. The govt. has ignored this completely, because this isn't about any relatively higher security risk from DJI than that posed by uncountable other...